Arc characteristics of high-energy pulsed precision cold welding and forming ability of additive manufacturing

The arc characteristics test of high-energy pulsed precision cold welding and additive manufacturing test of various parts were carried out,and the characteristics of pulsed arc were analyzed based on the pulsed current and voltage waveform. According to the forming characteristics of the surfacing parts,the additive manufacturing forming ability was analyzed. The results show that the output current of high-energy pulsed precision cold welding is pulsed square wave and the pulsed arc is intermittent. The pulsed arc has short pulse time,high arc energy density and long cooling time makes heat input less,thus the deformation of parts is small. During the surfacing forming process,the workpiece is in a cold state,and the molten pool exists for a short time and does not flow out. The surfacing forming parts have high forming accuracy.This method has the forming ability of complex parts,which can be used for additive manufacturing of complex parts with small geometric and additive forming repair of precision parts.